Door operating mechanism for dump cars



Aug. 16, 1949. w, F, BATH I 2,479,292

DOOR OPERATING MECHANISM FOR DUMP CARS Filed March 14, 1946 6 Sheets-Sheefl I 6 i n: I I

Hf Q I I/ ll "I 93 Q N u w L l N, I I, i I

U I i C) I I 6) I' z I g I I v) jg '2: a b r "1 I W; 222' w W II 6 I x g m III M 22 v If Y L I. I INVENTOR in mmam'fizamo Aug. 16, 1949. w. F. BATHO DOOR.OPERATING MECHANISM FOR DUMP CARS 6 Sheets-Sheet 2 Filed March 14, 1946 INVENTOR.

Aug. 16, 1949'. w. F. BATHO DOOR OPERATING MECHANISM FOR DUMP CARS 6 Sheets-Sheet 5 Filed March 14, 1946 M NE MN l 1. m w I. 4 n:

INVENTOR. /1 /'///4/77 fiat/7a W. F. BATHO DOOR OPERATING MECHANISM FOR DUMP CARS- Aug. 16, 1949.

6 Sheets-Sheet 4 Filed March 14, 1946 Aug. 16, 1949. w. F. BATHO DOOR OPERATING MECHANISM FOR DUMP CARS 6 Shets-Sheet 5 Filed March 14, 1946 INVENTOR.

h M/mm ff fiat/2a Za g Aug. 16, 1949. WE BA HO v 2,479,292'

,DOOR OPERATING MECHANISM FOR DUMP CARS Filed March 14, 1946 6 Sheets-Sheet 6 00000000 eeocooo INVENTOR. wu/zm f. Ba tho.

,4-r TORNE y Patented Aug. 16, 1949 DOOR OPERATING EUR JDU'MP CARS William'FrBatho, Chicago, Ill assignor to Enterpr s "Rai wa q ip t C mpan fl ieezo 111., a-corporation'of Illinois pp ic tion Manchu, 194e, smelling-mesa 14'IGlaims. '1

This invention relates to improvements indoor operating mechanism. for. dump cars.

One object of the invention is to provide a mechanism foroperatingdoors of dumpcars of thetypehaving a plurality of hinged-bottom doors arrangedlengthwise of and swingingly supported along their outer edges at opposite sides of the car, including ratchet means adapted to be latched tolock the .partsofthe operating mechanism against; movement, \Whereinthe means-tor latching .is automatically restrained from being movedlto loek ng positionunless the doors have been liully ,elosed, vthus protecting the operator against injury .which might otherwise occur with the usual latching means which .is at all times free to he moved .to locking position.

.Aiurtherohject ofthe invention is toiprovide an operating mechanism of the :character set forth in the preceding paragraph, which is ofcthe rotary ltype and includes rotary ratchet member and vva tcooperating locking pawl engageable 'with -.the ratchet member to positively lock the parts of the operating mechanism against rotation, wherein manually actuated -.means ;-is 'provided for positively movinglthe pawl :to various positions of adjustmentwvith respect to .the:rtaryratchet member to engage the ratchet wheel for ratcheting action, or positively lock the ratchet vwheel against rotation, or -.to I completely disengage the .pawl fromtheratchetwheel to permit free rotation of the latter.

.Anotherobject of .-the invention isto provide an operating .mechanism for hinged .doors of dump cars, including a rotary actuating means having a, ratchet wheel rotatable therewith and a cooperating ilatch member vor pawl for locking the actuating .means against rotation when vthe doorsare fully c1osed,:and manually operatedro- .taryicam means for moving the pawllto-loclring position,.wherein automatic mean-s isprovided for blocking rotation of thecam means to prevent locking. engagement of l the pawl with the ratchet wheel .unlessrthe doors have-been fully closedthy the 'operatingtmechanism. r V .-A-stil1. 'f:urther object of: the invention .is'to provide .an \operating means of the character set forth, including a rotary actuating member'designed totbeirotated-by a Wrench or ,similartool adapted tobeiengaged therewith, aratchetwheel rotatable with other actuating member, a pawl rfQI positively locking the ratchet wheel and actuating memberagainst rotation, andlmanually coperateimeans for moving the pawl to sengaged locking positionwith-respectto the. ratchet-wheel, wherein theengegementof-atheiwrencht orssimilar ol with the actuating membe is. fi el blacked by ,lmeane th wn into position by vsaid manually toneratedn ea ii moving het a l to its engaged l 'lplr-ing 'position ,with the ratchet eel, thus,p eventineapnliea ion 0f the wrench as Jone-a th ene atin m ans i .lockedlby e pawl no e-m ki gtimeeese tylto elea e-t a l from "its lookin engagement with .the ratchet whee jteiere the wrench may he ap li d :to acmate themeehanism; ther by pretecting theattendan agains in ry whieh might resul by possible r tat n the actuating member and of th wrench herewith su h a safet device werenot rov ded, rw ie weullde i t s w were unlocked from the rate-hel 'Wheehafter the wrenqh been .loperatiyelyiengaged with the actuatin gmemher.

A further phieet ef the inventionlis t r v de a otary reiterating means rf or hinge,d.d001s of dump care, including alratch t wheel, and a-lo ing ,pawl .eoer ratine therewith, means vfor visually :shoWirlg ttlleenosition. 9f athapawl with referenceto the .ratchet wheel toli-ndieate Whether it is in position entirely disengagedethereirom,. ortin ratcheting position, or "in position to positively lock the atche whee againstro e on- ,Qther objectseofltheeinventionwill more clearly ann a Item the neseri'ntion and t. laims hereinafteriol-lowmg In the .drawine termites-ex e ri-this.v sp fication V ,Fig..;1."is a rplan view, gpartly brokenlaway, of the .YimDIQ LQd doqreqperating mechanism we at a one endeithe'dmnpearrp rt ons-ef the ee s ruc e beingshawnain section. the end of -,the car .illustrated T being that usually designated as l the. op.- e iating'enli;

Frisian aeid elevationah iew, tlookin in e direction;oiithearmw pf lin -halite.

'E'ig..3 is vertica :seetionalvriew cor t s m n su antiall t ttheil ne i afieir erz;

gFig. fill sten elevationaltviewilookingeatthe side of the .ear eoml sitetto thatshpwn in Fi 2 Tie.i5.is a .vertiealvee tionelvview, pett y ek away, tthtqgeh the and ref the --ea-r.- loekine rom ri ht .to left in ehewi i ae sa ety ren h an iedio gpera in tthameehem m;

E gfiii t aneteree vert a se ion l v e eerr e ending i es antia l e t e lin 616 v Eig l hgi .a rieweimil r t tie W; 1 th na tse th tqnerat neime hanisml madifi ren Pos tion:

lLEi "sei earer ie leectieneh a w longitu inall 56 pf th eana sth lloeatione etdrop sioore on- 3 necting mechanism of the door operating means, showing the connecting mechanism in locked position and indicating, in dotted lines, the position of the parts assumed when the door is partly open;

Fig. 9 is a vertical sectional view, corresponding substantially to the line 9-9 of Fig. 1, showing the ratchet means and other parts of the operating mechanism in elevation, the ratchet wheel being locked by the cooperating pawl;

Fig. 10 is a view similar to Fig, 9, showing the pawl completely disengaged from the ratchet wheel;

Fig. 11 is a view similar to Fig. 9, with certain parts broken away, illustrating the ratcheting position of the pawl; and

Fig. 12 is a view, in side elevation, of an ore car in which the present invention is embodied.

My improved operating mechanism is preferably. employed in connection with a dump car I, Fig. 12,.having a pair of bottom doors 2 arranged lengthwise of the car at opposite sides thereof and hinged along their outer edges, which are well-known in this art. As illustrated in the drawings, my improved operating mechanism is particularly adapted to cars of this character and is of the type illustrated in Patent No. 1,547,640, granted July 28, 1925, to Argyle Campbell, which discloses a complete operating mechanism of this kind and the arrangement thereof on the car. Reference may be had to said Patent N 0. 1,547,640 for an understanding of the general arrangement andstructure of a door operating mechanism of the type in which my improvements are embodied.

As shown in the drawings, my improved operating mechanism comprises, broadly, a lifting and winding mechanism A at each end of the car (the winding mechanism at one end of the car only being shown), driving means B connecting the liftin and winding means at opposite ends of the car for simultaneous operation, and an actuating mechanism C at one end of the car for operating the lifting and winding mechanism.

Theliftingand winding mechanism A, which is duplicated .at oppositeends of the car, includes a shaft I journaled in suitable bearing brackets H, l2, l3, and I4, carried by the underframe of the car and arranged below the usual sloping floor as shown in Figure 12. The shaft NJ is preferably of squarecross section and is fitted with the usual cylindrical thimbles which form journals for the shaft rotatable in suitable bearing openings provided in the brackets I, l2, l3, and 4. As shown most clearly in Fig. 1, intermediate the bearing brackets l2 and l 3. which are mounted on the center sills of the car, the shaft I0 carries a hub i5 which is fixed thereto for rotation therewith. The hub |5 is provided with a pair of laterally spaced, radially extended arms |6-|6. A locking hanger I1 is pivotally connected to the outer ends of the arm [6-46, as shown in Figs.

1 and 8, the hanger having a hook-shaped upper end portion [8 which is embraced between the arms |'6|6 and supported for swinging movement between said arms by a pivot pin l9 extendin through the, extremity of said hookshaped portion and the arms |6--| 6. The hanger I! has a depending shank portion which extends below the shaft l0 and is laterally oflset at its lower end in the direction of said shaft, forming a head 20 from which are supported the usual set of two links 2|, only one of which is shown in the drawings. These links are designed to connect the hanger to the respective doors at opposite sides of the corresponding end of the car. These links may be of any well-known design and are supported from the head 28 of the hanger to swing about axes at right angles to the axis of swingin movement of the hanger. As is the usual practice, the links 2|, one of which is shown in Fig. 8, are disposed at opposite sides of the hanger l1 and are connected to the latter by a transversely extending bar 22 pivotally supported on the hanger by a pin 23 extending through the lower end of the head of the hanger which is forked as indicated at 24 to accommodate the bar. Each link 2| is forked at its upper end, as indicated at 25, to receive the corresponding outer end ofthe bar 22 and is pivotally connected to the latter by a pin 26 extending through the bar and the arms of the forked portion of the link. The lower end of each link 2| is anchored to the inner edge ofthe corresponding door to lift the latter as the link is lifted and moved downwardly with the door as the latter is lowered to open position.

As hereinbefore stated, the winding and lifting mechanism A is duplicated at the other end of the car and is arranged in a manner similar to that disclosed in Patent No. 1,547,640, hereinbefore referred to, being reversely arranged and reversely operable with respect to the mechanism A hereinbefore described to lift and lower the doors 2 at their corresponding ends in unison with the other ends thereof by means of link con-. nections 3. The lifting and winding mechanism is designed so that the hanger is moved to off-center position, in other words, beyond dead center, with respect to its connection with the shaft H! and the connection with the doors, thus being effectively locked against being pulled open by the doors. 7

The winding shafts of the two lifting and wind--. ing mechanisms at opposite ends of the car are connected for rotation in unison in reverse directions in a manner similar to the connection employed in Patent No. 1,547,640, the driving means B serving this purpose.

The driving means B comprises a sprocket wheel 21 fixed to the outer ,end of theshaft H] which is extended beyond the bearing bracket H for this purpose, a similar sprocket wheel fixed to the corresponding shaft of the lifting and winding mechanism at the other end of the car, and flexible connections 28 having links meshing with the two sprocket wheels and adapted to transmit reverse rotary movement from one shaft to the other.

The actuating mechanism C is preferably employed at one end of the car only, which end is usually termed the operating end of said car. This actuating mechanism comprises a rotary shaft 29, preferably of square transverse cross section, extending from one side to the other of the car in spaced relation with and parallel to the shaft Ill. The shaft 29 is journaled. for rotation in the central bearing brackets l2 and I3, the outer bearing bracket H at one side of the car, and an outer bearing bracket 30 at the opposite side of the car. The bearing bracket 30 is mountedon the car underframe, as shown in Fig. 4, in a manner similar to the bracket shown in Fig. 2. The opposite ends of the square shaft 29 project beyond the outer bearing brackets H and 30 respectively to receive a wrench 29, Fig. 5, or similar tool by which the shaft may be rotated. As will be evident, the shaft 29 may thus be operated from either side of the car, This shaft 29 also carries a ratchet wheel -3l at the 7 end thereof whichrprojects outwardly of the hearing bracket 11, said wheels-being fixed .tothe shaft for rotation in'unison'therewith. .As will be evident, the square portion of theshaft 29 projecting beyond the bearing bracket H .is 10f sufficient length to accommodate the ratchet wheel thereon and also provide a portinn outwardly of said wheel "to accommodate the wrench or other'tool. Between the bearing'brackets l2and I3, the shaft 29 carries a pinion 32fixed to saidshaft'forrotation therewith and meshing with a large gear wheel 33 mounted on the shaft to between said bearing brackets l2 and 13. The gear wheel 33 is freely rotatable'onthe s'haft Ill 'andis provided with a pair of clutch projections or lugs 34-34 at opposite sides thereof for a purpose hereinafter pointed out. Atopposite Sides of the gear wheel 33, the shaft l carries a pair of collars 35-35 which are fixed to the shaft for rotation in unison therewith. As clearly'shownin Fig. 1, the collars occupy the spaces at opposite sides of the gear wheel between thefbearing brackets l2 and i3 and the outer sides of the hub of the wheel, thus holding the gearwheel against move ment lengthwise on the shaft while permitting free rotation thereof with respect to the shaft. Each collar 35 is provided with a radially projecting lug or arm 35 which is in the path of movement of'thelug 34 at the corresponding side of .the gear wheel 33 and is 'engageable by the lug last named to effect rotation'of the shaft if! in unison with the gear wheel'to rotate the parts in door lifting direction. Inwardly "of the teeth thereof, the gear wheel 33 is provided witha relatively wide, laterally projecting circumferential flange or rim 3! which is at the forward side thereof, as viewed inFigs."6 andl, and which is interrupted at one point "to provide a slot or seat 38 for a purpose hereinafter pointed out. To provide a circular bearing on the square shaft H! for smooth rotation of thegearwheel 33, a cylindrical collar maybe mounted on theshaft between the collars 35-35.

A lockingpawl 39 is supported for swinging movement on the'bearing bracket ll above the ratchet wheel 3! by a pivot .pin l4ll'fixed in said bracket and extending through the upper end of the pawl. At the lower end, the pawl 39 has a depending tooth '40 which is engageable with the teeth of the ratchet wheel. As shown, the pawl 39 is of yoke-shaped 'form having upwardly converging side arms AI-41, which-merge at the upper ends, and a connectingbottom section 42, thus presenting an elongate'd'upwardly tapered opening 43. 'The pawl 39.is swung to its various positions of adjustmentby a cam finger 44 disposed within the opening "43 of the pawl and mounted on the projecting outer'end of -anopcrating shaft 45 extending from one 'side'to the other of the car and rotatablysupported in suitable bearings in the-brackets! I and '30 which are located at opposite sides of the car. The can: finger 44 is fixed to "the shaft "45 for rotation therewith and, when in the position shown in Fig. 10 holds the pawl completely disengaged from the ratchet wheel by engagement with the left-hand arm M of saidpawlto permit free .rotation of the ratchet wheel and the shaft"29. Byrotation of the operating "shaft 45"in="clockwise direction through an "angle of 90 degrees, the'icam finger is brought to the vertical position'shown in Fig. '11, releasing the "dog to ratchet over'the'teethofthe wheel 31. Rotation of "this shaft'in clockwise direction "through an "additional angle of ""90 v of .the pawl.

degrees brings the cam :linger n -to the position shown in Fig. '9, that is, in engagement with the right-hand arm-4| of the pawl forcing the latter nto locking engagement with the ratchet wheel and holding it in that position to positive'lyprevent rotation of said wheel and the shaft 25, thereby locking the entire operating mechanism against rotation. As will be evident, disengagement of the pawl from the locking position shown in Fig. 9 and positioning "the same for ratcheting action and full release, as shown respectively in Figs. 1c and 11, is effected by the action of the-cam finger '44 thrOugh'reVerserotation of the shaft 45. The shaft -45 carries a sector-shaped dog 46 which is located at the forwardside-of the gear wheel '33 inc. vertical "plane coincident with the flange-3'7 o'fsaidwheel. This dog is fixed to the shaft '45 andiisrotatabletherewith. In the position shown in'full lines in Fig. '7, the dog 46 is adapted to ride on the flange or rim 3'? of the gear wheel 33, being provided with-a'fiat cam face 4? on its upper side, as viewed in Fig. 6, designed to engage and rest on the flange '31. outwardly of the face'4l, the upper sideedge of the dog, as seen in Fig. '6, is notched'to provide a shoulder 48. When the gear Wheel 33 is turned to register the slot or seat 38 of the flange 31 with thedog 4%, the latter is free to enter the seat when the shaft 45 is rotated. The, parts of the operating mechanism are proportioned and designed so that, when the doors have been fully closed by the lifting and winding mechanism,'the hanger H isin the full-linejlocked position shown in Fig. 8, and the gear wheel 33 is in the position shown in Fig. G'with'the .seat SBregistering with the dog 45 so that the dog may be entered .w'ithin the seatland the ratchet mechanism locked,as shown in Fig. 9, with the camflnger 44 .positioned to hold the .pawl 33 in locked engagement with the ratchet wheel '3]. As will be evident, the pawl 33 cannot be moved to this locked position unless the .seat 38 of the gear wheel 33 registers with the dog 4.6,.as .in all other positions of the mechanism the pawl 39 will be prevented from being .moved to the position shown in Fig. 9 due tothe dog 43 riding on the flange .31 of the gear wheel.

The shaft 45, which carries the-cam finger 44 and the dog #6, is provided with operating head members 49 and 50 at opposite ends thereof by which the shaft may be manually rotated to adjust the pawl 39 to its locked, ratcheting, and completely released positions. The head membersdii and 50, which are fixedly secured .to the extremities of the shaft 45,-areof similardesign, each membercomprising diametrically oppositely extending arms 5! and :52, the-arm 52 having an angular extension 53 adaptedto-engage over and rest on top of the corresponding wrench-receivend of the shaft .29 when thepawl 391s. inilocking or closed position with respect to the .ratchet wheel 3|. This position of the head '49 is shown inFig. 2. To facilitate manual rotation of each head member, the same is preferably provided with spaced diametrically opposite lugs 54-54.

The different positions of adjustment .of the locking pawl 39 are indicated .to the operator by visual means provided in connection with the ratchet mechanism at each side of the car, the head 4.9 at one side of; the car, as shown inFigfZ, being provided with the legends Open, Batch: e't', and Closed to indicate respectively the fully released, ratcheting, andlocking positions These legend's are'arranged fiatrdi'fferent angles'so that "eachdegend "reads in horizontal direction when the pawl is in position indicated by that particular legend, in other words, when the head has been rotated to bring the pawl to its locked position the legend Closed reads horizontally; when the head has been rotated to bring the pawl to ratcheting position the legend Ratchet reads horizontally; and when the head has been rotated to bring the pawl to fully released position, the legend Open reads horizontally. The head 53 at the opposite side of the car, as shown in Fig. 4, has a toothlike pointer 55 at one side thereof, arranged to register with indicating ribs 5556-5B on the outer face of the bearing bracket 30, these ribs being disposed radially to the shaft 45 at angles of 90 degrees with respect to each other and provided with arrow heads pointing toward the axis of rotation of said shaft. Adjacent to each rib is placed the proper legend which corresponds to the position of the pawl 39 when the pointer registers with that particular rib, the legends Open, Ratchet, and Closed being used to designate respectively the completely released, ratcheting, and locking positions of the pawl.

The operation of my improved mechanism is as follows: Assuming that the doors are fully closed with the various parts of the operating means positioned as shown in Figs. 1, 2, 3, 6, 8,

and 9, and the locking hangers seated on the respective hubs to eliminate pull or torsion on the shafts which carry the locking hangers, the attendant rotates the shaft 45 in contraclockwise direction by means of the head 49, as shown in Fig. 2, or in clockwise direction by the head 50, as shown in Fig. 4, to full open position as shown in Fig. 10, thereby lifting the arms 53-53 of both heads 49 and 50 out of engagement with the wrench-receiving ends of the shaft 29 to clear the latter to accommodate the wrench. This rotation of the shaft 45 also rotates the cam finger 44 to position as shown in Fig. 10, and the dog 46 to the dotted position as shown in Fig. '7. The pawl 33 is thus unlocked from the ratchet wheel and brought to full open position and the dog 46 lifted entirely clear of the seat 38 in the rim or flange of the gear wheel 33. The operating wrench or similar tool is then engaged with the wrench-receiving end at either end of the shaft 29 and rotated in clockwise direction as shown in dotted position in Fig. 2, thereby imparting rotation of the gear wheel 33 in contraclockwise direction. Although any suitable type of wrench may be used to actuate the operating mechanism, it is preferable to employ a ratchet wrench of the safety type, as shown in Fig. 5 and indicated in dotted lines in Fig. 4. During this action, the gear wheel 33 rotates freely on the shaft [3 from the approximate position shown in Fig. 6 to a position in which the lugs 3434 of the gear wheel come into engagement with the rear or right-hand side edges of the arms 36-46 of the shaft l0. Further rotation of the gear wheel 33 causes the shaft It! to rotate therewith, and through the connecting means 28 also effects rotation of the corresponding shaft at the other end of the car, but in reverse direction. As will be evident upon reference to Fig. 8, slight rotation of the shaft H! swings the hanger l1 toward the dotted line position shown in said figure, unlocking the same and permitting the doors to swing open due to the action of gravity and the additional pressure exerted by the load thereon. Rotation of the shaft l0 during this action is independent of the gear wheel 33, the shaft I0 moving in contraclockwise direction, turning 8 freely in the gear wheel as the lugs 34-34 move in contraclockwise direction away from the lugs 3636. The gear wheel 33 and the inter-connected parts of the operating means thus remain stationary, thereby protecting the operator against injury.

In closing the doors, the operation is a reversal of the operation just described, the lugs 3434 of the gear wheel 33 being brought into engagement with the arms 36-36 of the shaft H] by clockwise rotation of the gear wheel, as shown in Fig. 7, and effecting rotation of the shaft I 0 in unison with the gear wheel until the parts reach the positions shown in Figs. 6 and 8 with the door fully closed and the hanger I1 locked in off-center position. During this closing action of the doors, the dog 46 rides on the rim of the gear wheel 33 and can only enter the seat 38 when the gear wheel is in the position shown in Fig. 6. While the dog 46 is riding on the flange of the gear wheel, the pawl 39 is in ratcheting position with respect to the ratchet wheel, as shown in Fig. 11, but cannot be locked to the latter by the cam finger 44 as rotation of the shaft 45 in direction to lock the pawl is blocked by the flange 31 of the gear 33 with which the dog 46 is engaged. It will thus be evident that unless the door has been fully closed and locked, it is impossible to lock the pawl to the ratchet wheel and any attempt to rotate the actuating heads 49 and 50 in a direction to lock the pawl is effectively blocked, thereby giving the operator warning that the doors are not fully closed and the mechanism is in dangerous condition for operation.

I claim:

. 1. In an operating mechanism for hinged doors of dump cars, the combination with rotary means mounted on the car for closing said doors; of manually actuated means for effecting rotation of said first-named means; a ratchet wheel rotatable with said second-named means; a locking element movable toward and away from said ratchet wheel and engageable therewith to lock the same against rotation; a manually actuated member for moving said locking element into locking engagement with the ratchet wheel; a detachable operating tool for effecting the operation of said manually actuated means; and means controlled by movement of said manually actuated member for blocking access of said detachable operating tool; to said manually actuated means when said locking element is in locked engagement with the ratchet wheel.

2. In an operating mechanism for hinged doors of dump cars, the combination with rotary means mounted on the car for closing said doors; of manually actuated means for effecting rotation of said first-named means; ratchet means for holding said rotary means against rotation in door opening direction; a second manually operated means for locking said ratchet means; a detachable operating tool for effecting the operation of said first mentioned manually actuated means; and means controlled by operation of said second manually operated means for blocking access of said detachable operating tool to said manually actuated means when said ratchet means is in locked condition.

3. In an operating mechanism for hinged doors of dump cars, the combination with rotary means mounted on the car for moving the doors to closed position, said means including a rotary element having a circular .rim provided with an opening therethrough; of a ratchet wheel rotatable with wee:

said nieans;.-a1looling-pawl engageableswitnsaidi ratchet; wheel; rotaryacam lme'ansi .fiqr;,moving Zthe,

pawl towardi. andiawayifrom, and; controlling the. position thereof withlrespectgto\theratchetwheel;

said. cam; means-being rotatable. to) a. position. to

holdfthepawl ilocleedato \theratchet wheelg; anda dogs rotatablel, withsaid: cam means, said; rim of saiderotary' element; being in therpatnv oiymove-.

ment of: said;; dog: to; liin-itsrotation thereof: and:

prevent rotation of; said: cam; meanstog an. extent toilocksaid: pawl to; tha ratchet-wheel,- said dogbeing movable. into Lthaopening-ofi saidri-m when.

saidirotary .elemeo-tihas beengrotated to anen ent;

o.- f-.u1-1y close said doors, and. release, said a loeliedzto the-ratchet wheel;

4;. In anopera inei-mech nisrn orhina ddoors oi-d-ump cars the. combinationswith rota y ea s in: osi on e s naeesitio tn e r o;

he: atc-b awh e nd-a, oiitrolline e e nt oata e Wi ear a ai im f: sai

an n o sa d cam. k; awl; t h eo said r m; e is erwhentheoors 8 ee 0 rotary =-e 121 nt andeer t re 'H' iYrQ Qd-'* t n e rem itot ai en ee otat on o he, an o, ext nt o ock;

said pawlto-the gatphet-wheel eat h el-x a he wheel} ame.

hi f tary means. i a not y ear from said; ratchet wheel and engageable therewith to lock the same against rotation; a rotatable member for m vingsaid pawl into locking e a emen w h sa d r tthetw eei; and still element rotatable with said member s,aid, rim of, the gear wheel being in the path of movement of said stop element to: beengaged thereby and prevent rotation of said member to a position tolook the pawl to, said ratchet wheel, said interrupted portion of the rim' of said gear; wheel registering with, saidstop element when the. doors have been fully closed, thereby permitt' I rree rotation of saidjstop element and of said r' tatablemember e tent lock ;earltqthe hetwh 6-. In an operating mechanism for hinged doors of dump cars, the combination with rotary means mounted on the car for closing said doors; of a ratchet wheel rotatable with said rotary means; a locking pawl engageable with said ratchet wheel; a wrench-receiving member rotatable with said rotary means and ratchet wheel; adjusting means for moving said pawl into locked engagement with the ratchet wheel; and an operating head for actuating said last-named means, said operating head having an arm swingable therewith toward said member and into blocking relation with respect thereto to prevent application of the wrench when said pawl has been locked to said ratchet wheel by said adjusting means.

7. In an operating mechanism for hinged doors means, to rotate to; a position to. hold he pawhafttowhlch a decam member'is-fixed; andian pinion; a locking pawl movable toward andiaway,

a er Qamm mbe en a ing saimpawhto mor I-I $1 in ed-doors ins movementtoward and operating means, said shaft mem atin mea s; inc ud mount d on amba-r;- f; a. re

of; dumpiears, the; q mbinaiieni ithimt atinameans mount doors; f; a ratchet. Wheel Qtat erasing-means; al owin -paw p way whe l; a rotary earn. member r; movi g sa d pawl. ntov enaaaenlentv w by said: a h e landiockine hesamain .ngaaedn sition; a thatt member otatable, wi h sa d; atchet; Wheel and e havin w enchereee ina. portion; ila n actua ed. element; etatable ith said em e e nqpe a d nsaid e ement he a fi ed; armv wingable e nd" ensageab e with he wreneh re eiv pe i n ofi-saidshait mem er: to.bloc a enchf pm appli a ion to he w eath! re eiv ng; portion, Qt-

said, h ft-member;.

fwd mnc s, heic m tion tary;- ac ua i-na shaft.- .t wheel fixed o said'shaf i, a d hafthar e re ec n orti shaped o rec ive a W eneh; o rotate thesame; pivotedpaw r win -a le nwa d: and awa f om said ratchet; wheel o -en a e he ee h there f;

whee sa d cam member be wi h e t het Wheel; asecondi otary ac ua in v arm on said second-named shatt, said; armabeingj moved: toe etition Over hapmje tine portion of a d firstrnamedsh tobloelsa from. pplica io to. e m. teq rma po io of aid: sha t member en sa d member: has been ot e t said qs. ckithena 1:.

9.:- nan one for h n ed-doors, o dum l r the tembinetion rotary mea o c i Said: do rs. nclu ing a r tary. c uat-v ing shaft havi aid h t ha n a rqieetin portio .v dapt do. r eive, a wr nch, ta wh ch; said: h t isv r0 a e Qia v d paw eneaeeabl th said: ratchetwhee a e atab r inies -ab e. tam eme ee e g ging. said er mat n thesame to- War and: item .r etwheel, said cam, mem er bein rotate b ili ta le. to, positions.

.c n, telyv blsenea ed fromxthe, atch Wheels. old. i ratc etin Le a-tion with,

am-ex a d a arm; rotata le. with said, cam, memtor nd en ed: ver sa d projectin portion of the Shaf wh n sa d operable to bloc]; aqnnlri'oationsofz the wrench to eidrrcie i enortion ottheshart.

litan alienatin mechanism for hinged doors i-dump, cans, thegcombination with. wind-, ns-means. for. 1i maths; doors. to; closed position;

' of a rotary gear member having a lost motion f and engageable therewith to lock the same against rotation; a manually actuated rotary member for moving said locking element into locking engagement with the ratchet wheel; a dog rotatable with said rotary member and riding on said rim to prevent said rotary member from moving the locking element to locked position,

nthe ca do losingsaidr tatable opos t on. t ocksa d; n vel en a ed relation a. ra ehe, whee fixed here o;

respect to said wheel, and hold; it locked.- tothe'.

.N cam, memberhas been, tated; to its adjusted positionlast named and,

said gear member being rotated to a position with the opening in the rim thereof in registration with said dog'when the doors are fully closed to permit said dog to enter said opening and the rotary member to move said locking element to locked position; and means controlled by the movement of said manually actuated member for blocking access of an operating tool to said manually actuated means when the locking element is in locked position.

11. In an operating mechanism for hinged doors of dump cars, the combination with winding means for lifting the doors to closed position; of manually actuated rotary means for transmitting rotary movement to said winding means, said rotary means including a gear member having a rim interrupted by an opening therethrough; a ratchet wheel rotatable with said manually actuated rotary means; a locking pawl movable into and out of engagement with said ratchet wheel; a manually operated rotary shaft having a cam member thereon for moving said pawl into locking engagement with the ratchet wheel; and a dog fixed to said shaft and riding on the rim of said gear member to prevent said cam member from being rotated to a position to lock the pawl to the ratchet wheel, said dog being movable into the opening of the rim of said gear member when the latter has been rotated to an extent to fully close said doors, thereby releasing said cam member to be rotated to lock the pawl to the ratchet wheel.

12. In an operating mechanism for hinged doors of dump cars, the combination with a rotary winding member for lifting the doors to closed position; of a rotary driving shaft for actuating said winding member; a ratchet wheel fixed to said shaft; a locking pawl engageable with said ratchet wheel; means for moving said pawl toward and away from said ratchet wheel including a cam rotatable to a position to lock the pawl to the ratchet wheel and thereby lock said shaft against rotation, said shaft having a projecting end adapted to receive a wrench for rotating the same; and a movable blocking member for said end of the shaft actuated by rotation of said cam, said blocking member being movable over the end of said shaft by movement of said cam to said pawl-locking position, thereby preventing application of the wrench when the operating mechanism is locked.

13. In an operating mechanism for hinged doors of dump cars, the combination with a rotary winding element for lifting the doors to closed position; of a rotary driving shaft for said winding element, said shaft having an end thereof shaped to receive a wrench; a ratchet wheel fixed to said shaft; a pivoted locking dog swingable into and out of engagement with the ratchet wheel; a manually operated rotary cam for moving said pawl into engagement with the ratchet wheel, said cam being rotatable to a posi-" tion to hold the pawl locked to said wheel, thereby holding said shaft against rotation; means for preventing said cam from moving to said pawllocking position as long as the doors are not fully closed, comprising a member rotatable with said winding element and a dog riding on said member, said dog being rotatable with said cam, said member having a recess therein adapted to register with the dog when the doors have been fully closed to allow clearance for further rotary displacement of the dog and movement of the cam to a position to lock the pawl to the ratchet wheel; and an arm rotatable with said cam for blocking said Wrench-receiving end of the shaft when the cam is in looking position with respect to the pawl, thereby preventing application of the wrench.

14. In an operating mechanism for hinged doors of dump cars, the combination with a rotary winding element for lifting the doors to closed position; of a rotary driving shaft for said winding element; a ratchet wheel fixed to said shaft; a pivoted locking pawl swingable into and out of engagement with the ratchet wheel; a manually operated rotary cam for moving said pawl into to engagement with the ratchet wheel, said cam being rotatable to a position to lock said pawl against movement away from said ratchet wheel and thereby lock said shaft against rotation; and means for prevent ing said cam from moving to said locking position as long as the doors are not fully closed, comprising a member rotatable with said winding element and having a rim provided with a recess, and a dog riding on said rim and movable into said recess when said member has been rotated to a position to register said recess with the dog, said member being brought to the lastnamed position when the doors are fully closed, said dog being rotatable with said cam and swingable into said recess to allow rotary movement of the cam to a position to lock the ratchet wheel.

WILLIAM F. BATHO.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 801,459 Kendig Oct. 10, 1905 1,124,188 Weaver Jan. 5, 1915 1,300,471 O'Connor Apr. 15, 1919 1,445,444 Liebman Feb. 13, 1923 1,517,005 Hobb Nov. 25, 1924 1,711,211 Schmohl et al Apr. 30, 1929 

